21710173216 has 24 divisors (see below), whose sum is σ = 43256871504. Its totient is φ = 10724301120.

The previous prime is 21710173141. The next prime is 21710173217. The reversal of 21710173216 is 61237101712.

It is not an unprimeable number, because it can be changed into a prime (21710173217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084350 + ... + 4089661.

It is an arithmetic number, because the mean of its divisors is an integer number (1802369646).

Almost surely, 2^21710173216 is an apocalyptic number.

It is an amenable number.

21710173216 is a deficient number, since it is larger than the sum of its proper divisors (21546698288).

21710173216 is an equidigital number, since it uses as much as digits as its factorization.

21710173216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174104 (or 8174096 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

Adding to 21710173216 its reverse (61237101712), we get a palindrome (82947274928).

The spelling of 21710173216 in words is "twenty-one billion, seven hundred ten million, one hundred seventy-three thousand, two hundred sixteen".